After 30 years in orbit, mission operations for the joint NASA-JAXA Geotail spacecraft have ended, after the failure of the spacecraft’s remaining data recorder. Since its launch on July 24, 1992, Geotail orbited Earth, gathering an immense dataset on the structure and dynamics of the magnetosphe
in Greenbelt, Maryland, and NASA’s first project scientist for Geotail until his retirement in 2008. “The mission made important contributions to our understanding of how the solar wind interacts with Earth’s magnetic field to produce magnetic storms and auroras.”
With an elongated orbit, Geotail sailed through the invisible boundaries of the magnetosphere, gathering data on the physical process at play there to help understand how the flow of energy and particles from the Sun reach Earth.
The mission also helped identify the location of a process called magnetic reconnection, which is a major conveyor of material and energy from the Sun into the magnetosphere and one of the instigators of the aurora. This discovery laid the way for theOver the years, Geotail collaborated with many of NASA’s other space missions including MMS, Van Allen Probes, Time History of Events and Macroscale Interactions during Substorms mission, Cluster, and Wind.
Although Geotail is done gathering new data, the scientific discoveries aren’t over. Scientists will continue to study Geotail’s data in the coming years.
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